From 099c9906e8f8fbf2fdf9fd0be591281d67eec438 Mon Sep 17 00:00:00 2001
From: Mikhail Khodjaiants <mikhailkhod@googlemail.com>
Date: Thu, 10 Oct 2002 22:16:14 +0000
Subject: [PATCH] Check if the selected frame is current before calling
 'setCurrentStackFrame'.

---
 debug/org.eclipse.cdt.debug.core/ChangeLog    |  3 +++
 .../debug/internal/core/model/CThread.java    | 23 ++++++++++++++++---
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/debug/org.eclipse.cdt.debug.core/ChangeLog b/debug/org.eclipse.cdt.debug.core/ChangeLog
index e5fcf902397..36c4f358b91 100644
--- a/debug/org.eclipse.cdt.debug.core/ChangeLog
+++ b/debug/org.eclipse.cdt.debug.core/ChangeLog
@@ -1,3 +1,6 @@
+2002-10-10 Mikhail Khodjaiants
+	* CThread.java: Check if the selected frame is current before calling 'setCurrentStackFrame'.
+
 2002-10-10 Mikhail Khodjaiants
 	* CStackFrame.java: Added Getter and Setter for 'fRefreshVariables'.
  
diff --git a/debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/internal/core/model/CThread.java b/debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/internal/core/model/CThread.java
index 9de18d0dbb3..4750cccda9b 100644
--- a/debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/internal/core/model/CThread.java
+++ b/debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/internal/core/model/CThread.java
@@ -93,7 +93,9 @@ public class CThread extends CDebugElement
 	/**
 	 * Whether this thread is current.
 	 */
-	private boolean fIsCurrent = false;	
+	private boolean fIsCurrent = false;
+	
+	private CStackFrame fLastStackFrame = null;	
 
 	/**
 	 * Constructor for CThread.
@@ -826,6 +828,7 @@ public class CThread extends CDebugElement
 	private void handleResumedEvent( ICDIResumedEvent event )
 	{
 		setRunning( true );
+		setLastStackFrame( null );
 		int state = IState.RUNNING;
 		int detail = DebugEvent.UNSPECIFIED;
 		if ( isCurrent() )
@@ -974,14 +977,18 @@ public class CThread extends CDebugElement
 	 */
 	public void switchToFrame( IStackFrame frame ) throws DebugException
 	{
-		if ( frame == null && !(frame instanceof CStackFrame) )
+		if ( frame == null || !(frame instanceof CStackFrame) || frame.equals( getLastStackFrame() ) )
 		{
 			return;
 		}
 //		((CDebugTarget)getDebugTarget()).resetRegisters();
 		try
 		{
-			getCDIThread().setCurrentStackFrame( ((CStackFrame)frame).getCDIStackFrame() );
+			if ( getLastStackFrame() != null )
+			{ 
+				getCDIThread().setCurrentStackFrame( ((CStackFrame)frame).getCDIStackFrame() );
+			}
+			setLastStackFrame( (CStackFrame)frame );
 		}
 		catch( CDIException e )
 		{
@@ -993,4 +1000,14 @@ public class CThread extends CDebugElement
 	{
 		return ((CDebugTarget)getDebugTarget()).getRealSourceMode();
 	}
+	
+	private void setLastStackFrame( CStackFrame frame )
+	{
+		fLastStackFrame = frame;
+	}
+	
+	private CStackFrame getLastStackFrame()
+	{
+		return fLastStackFrame;
+	}
 }